Pendulum-regulator for clocks



(No Model.)

B. DAVIES Pendulum Regulator for Clocks.-

Patented Aug. 31,1880.

N. PETERS, PHOTO-UTHOGR PHE UNITED STATES PATENT OFFI E.

EDWARD DAVIES, OF BROOKLYN, NEW YORK, ASSIGNOR TO THE ANSONIA CLOCK COMPANY, OF ANSONIA, CONNECTICUT.

PENDULUM-REGULATOR FOR CLOCKS.

SPECIFICATION forming part of Letters Patent No. 231,770, dated August 31, 1880.

Application filed July 20, 1880.

To all whom it may concern.-

Be it known that I, EDWARD DAvIEs, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Penduluni-Regulators for Clocks, of which the following is a specification.

This-invention relates to that class of pendulum-regulators which are adjusted by a spin- IO dle or arbor, one endof which presents itself through or at an opening in the dial or front of the clock; and the particular object of theinvention is to afi'ord provision for adapting movements of one size and pattern with pend- 15 ulum-regulating devices of the class above mentioned to dials or clock-fronts of various sizes.

My invention consists in the combination, with the pendulum-rod of a clock and a fixed stud through which said rod is capable of vertical movement, of abell-crank lever connected by one arm with the pendulum-rod and a screw-threaded spindle or arbor working in a nut in the other arm'of said lever, and a fixed support for said spindle or arbor, whereby its longitudinal movement is prevented.

One end of the spindle or arbor presents itself at or through an opening in the dial or front of the clock, and by turning said spindlelor arbor the bell-crank lever is tilted and the vibratory portion of the pendulum lengthened or shortened.

The nut in the bell-crank lever, with which the screw-threaded spindle or arbor engages, is preferably supported upon trunnions or swiveled so as to readily accommodate itself to the position of the said spindle or arbor, and one of the plates of the clock-movement has attached to or extending from it a pro- 4 jection or upright which fits between two shoulders upon the screw-threaded spindle or rod and prevents longitudinal movement of the latter, while permitting of the free movement in a vertical plane ofits outer end, which projects through or presents itself 0pposite to an opening in the dial or front of the clock.

In the accompanying drawings, Figure 1 represents a rear elevation of the back plate of a clock-movement, a pendulum-rod and its (N0 model.)

suspension-spring, and regulating devices embodying my invention and Fig. 2 represents a vertical section through a dial and a partly sectional side view of the regulating devices for the pendulum-rod. 5 5

Similar letters of reference designate corresponding parts in all the figures.

It will be seen that I have only represented such parts of the movement as are necessary to illustrate the nature of my invention, all the wheel-work being omitted.

A B designate, respectively, the rear and front plates of a clock-movement, and C the dial attached to posts a, projecting from the front plate, 13, in the ordinary manner.

D designates the pendulum-rod, and D the suspension-spring at the upper end thereof.

E designates the fixed stud, slotted to receive the suspension-sprin g. All these parts are similar in construction and arrangement to corresponding parts in clock-movements in common use.

F designates a bell-crank lever pivoted to the back plate, A, of the movement, or, as here represented at b, to an upright support or hearing, G, attached thereto for the attachment of the pendulum and its regulator. In one arm of this bell-crank lever the suspension-spring is pivoted, (see Fig. 2,) and the other arm of said lever is provided or constructed with a nut, c, with which engages a screw-threaded spindle or arbor, H, of sufficient length to project slightly beyond the dial 0 or the front of the clock. As here represented the said spindle or arbor fitsin anotch 8 5 or slot, (1, in the upper portion of the support or hearing Gr, and its longitudinal movement is prevented by means of collars 0, fixed upon the said spindle or arbor, upon each side of the said support. 0

It will be readily seen that when the spindle H is thus supported and confined its outer end, which presents itself at or projects through a suitable opening in the dial or front of the clock, may be moved upward or downward in 5 a vertical plane, so as to permit of movements of the same size being used with large or small dials, the outer or free end of the spindle being afforded a bearing in the dial. For example, the spindle may be inclined below a horizontal line, as shown in full outline in Fig. 2, if a dial the size of the one shown in full outline in said figure be used; or said spindle may occupy a horizontal position, as shown in dotted outline in Fig. 2, if a dial the size of that shown in dotted outline, projecting be yond the edges of dial in full outline, be used. If a still larger dial be used the spindle might be inclined above a horizontal line with equal facility.

In order to enable the nut c to accommodate itself to the spindle H, whatever may be its inclination relatively to a horizontal line, the arm of the bell-crank lever F which carries the nut C, is bifurcated, and the nut is supportedin trunnions f, as shown clearlyin Fig. 1.

It will be observed that by turning the spindle H in one direction the bell-crank lever F will be tilted and the pendulum-rod D raised, so as to shorten the distance between the fixed stud E and the pendulumbob, while by turning the said spindle in the opposite direction the said bell-crank lever will be tilted in the opposite direction and the pendulum-rod lowered to increase the distance between the fixed stud and the pendulum-bob.

In carrying out this invention it is desirable, in order to better adapt the regulator to dials considerably varying in size, that the pendulum-rod be arranged at the back of the movement, as here shown, so that a long spindle or arbor may be obtained and an objectionable degree of slant of said spindle or arbor be avoided; yet the same regulator might be adapted to clocks with the pendulum at or near the front.

crank lever connected by one arm with the pendulum-rod, a screw-threaded spindle workingin a nut in the other arm of said lever, and a fixed support for said spindle, whereby its longitudinal movement is prevented, substantially as and for the purpose specified.

2. The combination, with the pendulum-rod and dial of a clock, of a lever connected with the pendulum-rod, a swiveled nut in said lever, and an arbor or spindle which is fitted to a fixed support and one end of which is screwthreaded to engage with said nut and the other end of which presents itself at or through an opening in the dial substantially as and for the purpose specified.

3. The combination of the pendulum-rod D, fixed slotted stud E, bell-crank lever F, swiveled nut O, fitted in said lever, the screwthreaded spindle or arbor H, working in said nut, and the fixed support or hearing G for said spindle or arbor, substantially as specified.

E. DAVIES.

Witnesses FREDK. HAYNES, F. THoRNHILL. 

